<template>
  <page-header-wrapper>
    <!-- PageHeader 第二种使用方式 (v-slot) -->
    <template v-slot:content>
      将一个冗长或用户不熟悉的表单任务分成多个步骤，指导用户完成。
    </template>
    <a-card :bordered="false">
      <a-steps class="steps" :current="currentTab">
        <a-step title="填写转账信息" />
        <a-step title="确认转账信息" />
        <a-step title="完成" />
      </a-steps>
      <div class="content">
        <step1 v-if="currentTab === 0" @nextStep="nextStep"/>
        <step2 v-if="currentTab === 1" @nextStep="nextStep" @prevStep="prevStep"/>
        <step3 v-if="currentTab === 2" @prevStep="prevStep" @finish="finish"/>
      </div>
    </a-card>
  </page-header-wrapper>
</template>

<script>
import Step1 from './Step1';
import Step2 from './Step2';
import Step3 from './Step3';

export default {
  name: 'StepForm',
  components: {
    Step1,
    Step2,
    Step3
  },
  data() {
    return {
      currentTab: 0,
      // form
      form: null
    };
  },
  methods: {

    // handler
    nextStep() {
      if (this.currentTab < 2) {
        this.currentTab += 1;
      }
    },
    prevStep() {
      if (this.currentTab > 0) {
        this.currentTab -= 1;
      }
    },
    finish() {
      this.currentTab = 0;
    }
  }
};
</script>

<style lang="less" scoped>
  .steps {
    max-width: 750px;
    margin: 16px auto;
  }
</style>
